It is, however, unfortunate to have to state that the compiler (Kashinath Sharma)of this work seems to be misidentified.
This is in fact a copy of the 1952 edition published by the Nirnaya Sagar Press on May 01, 1952, "enlarged and re-edited with sources etc." by Narayan Ram Acharya.
Acharya clearly mentions in his Introduction that the Subhashita-ratna-bhandagara "began as, and still remains an eclectic collection of choice Sanskrit verse made by the learned pundits associated with the Nirnaya Sagar Press".
While thanking "archive.org" for making available to the readers this valuable text, I have to request them to be careful about the authorship and editorship of the concerned works.